# -*- Mode:Python; indent-tabs-mode:nil; tab-width:4 -*-
#
# Copyright (C) 2017 Canonical Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import os

from ._schema import Validator  # noqa


def load_config(project_options=None):
    from ._config import Config
    return Config(project_options)


def replace_attr(attr, replacements):
    if isinstance(attr, str):
        for replacement in replacements:
            attr = attr.replace(replacement[0], str(replacement[1]))
        return attr
    elif isinstance(attr, list) or isinstance(attr, tuple):
        return [replace_attr(i, replacements)
                for i in attr]
    elif isinstance(attr, dict):
        return {k: replace_attr(attr[k], replacements)
                for k in attr}

    return attr


def get_snapcraft_yaml(base_dir=None):
    possible_yamls = [
        os.path.join('snap', 'snapcraft.yaml'),
        'snapcraft.yaml',
        '.snapcraft.yaml',
    ]

    if base_dir:
        possible_yamls = [os.path.join(base_dir, x) for x in possible_yamls]

    snapcraft_yamls = [y for y in possible_yamls if os.path.exists(y)]

    import snapcraft.internal.errors
    from snapcraft.internal.project_loader import errors
    if not snapcraft_yamls:
        raise errors.MissingSnapcraftYamlError(
            snapcraft_yaml='snap/snapcraft.yaml')
    elif len(snapcraft_yamls) > 1:
        raise snapcraft.internal.errors.SnapcraftEnvironmentError(
            'Found a {!r} and a {!r}, please remove one.'.format(
                snapcraft_yamls[0], snapcraft_yamls[1]))

    return snapcraft_yamls[0]
